Type Chart Boltdepot

1. Fastener Type Chart
™
fastener shoppingmade easy
Copyright © 2000-2010 Bolt Depot Inc.
PRINTABLE FASTENER TOOLS SERIES
Fastener Categories
Wood Screws Machine Screws Thread Cutting
Machine Screws
Sheet Metal Screws
Self Drilling SMS
Screws with a smooth shank
and tapered point for use in
wood. Abbreviated WS
Screws with threads for use
with a nut or tapped hole.
Abbreviated MS
Machine screws with a thread
cutting (self tapping) point.
Fully threaded screws with a
point for use in sheet metal.
Abbreviated SMS
A sheet metal screw with a self
drilling point.
Hex Bolts Carriage Bolts Lag Bolts
Set Screws
Bolts with a hexagonal head
with threads for use with a nut
or tapped hole. Abbreviated
HHMB or HXBT.
Bolts with a smooth rounded
head that has a small square
section underneath.
Bolts with a wood thread and
pointed tip.
Abbreviated Lag.
Machine screws with no head
for screwing all the way into
threaded holes.
Socket Screws Eye Bolts Eye Lags
U-Bolts
Socket screws, also known as
Allen Head, are fastened with a
hex Allen wrench.
A bolt with a circular ring on
the head end. Used for
attaching a rope or chain.
J-Bolts Shoulder Bolts
J shaped bolts are used for
tie-downs or as an open eye
bolt.
Shoulder bolts (also known as
stripper bolts) are used to
create a pivot point.
Elevator Bolts
Elevator bolts are often used in
conveyor systems. They have a
large, flat head.
Similar to an eye bolt but with
wood threads instead of
machine thread.
Bolts in U shape for attaching
to pipe or other round
surfaces. Also available with a
square bend.

2. Fastener Type Chart
™
fastener shoppingmade easy
Copyright © 2000-2010 Bolt Depot Inc.
PRINTABLE FASTENER TOOLS SERIES
Head Styles
Flat
A countersunk head with a flat
top.
Abbreviated FH
Oval
A countersunk head with a
rounded top.
Abbreviated OH or OV
Pan
A slightly rounded head with
short vertical sides.
Abbreviated PN
Truss
An extra wide head with a
rounded top.
Round
A domed head.
Abbreviated RH
Hex
A hexagonal head
Abbreviated HH or HX
Socket Cap
A small cylindrical head using a
socket drive.
Button
A low-profile rounded head
using a socket drive.
Hex Washer
A hex head with built in
washer.
Slotted Hex Washer
A hex head with built in
washer and a slot.
Fastener Categories (continued)
Mating Screws
Mating screws have a
shoulder that matches the
diameter of the sex bolts
they are used with.
Sex Bolts
Sex bolts (a.k.a. barrel nuts or
Chicago bolts) have a female
thread and are used for
through bolting applications
where a head is desired on
both sides of the joint.
Hanger Bolts
Hanger bolts have wood
thread on one end and
machine thread on the other
end

3. Fastener Type Chart
™
fastener shoppingmade easy
Copyright © 2000-2010 Bolt Depot Inc.
PRINTABLE FASTENER TOOLS SERIES
Drive Types
Phillips and Frearson
An X-shaped drive.
Abbreviated PH
One Way
Installs with a normal slotted
driver but can not be removed
without special tools.
Square
Also known as Robertson
drive.
Abbreviated SQ or SD.
Torx
A six-pointed star pattern,
specifically designed to
prevent cam-out and stripped
heads.
Slotted
A slot in the head.
Abbreviated SL
Combination
A combination of slotted and
Phillips drives.
Abbreviated combo
Socket, Hex or Allen
A hexagonal hole for use with
an Allen wrench.
Washer Types
Flat
A flat washer, used to distribute
load. Available in SAE, USS and
other patterns.
Fender
An oversize flat washer used to
further distribute load
especially on soft materials.
Finishing
A washer used to obtain a
‘finished’ look. Usually used
with oval head screws.
Split Lock
The most common style of
washer used to prevent nuts
and bolts from backing out.
External Tooth Lock
A washer with external ‘teeth’.
Used to prevent nuts and bolts
from backing out.
Ogee
Thick, large diameter, cast iron
washers with a curved or
sculpted appearance. Typically
used in dock and wood
construction.
Internal Tooth Lock
A washer with internal ‘teeth’.
Used to prevent nuts and bolts
from backing out.
Square
A square shaped washer.
Dock
Dock washers have a larger
outside diameter and are
thicker than standard.

4. Fastener Type Chart
™
fastener shoppingmade easy
Copyright © 2000-2010 Bolt Depot Inc.
PRINTABLE FASTENER TOOLS SERIES
Nut Types
Hex
A six sided nut. Also referred to
as a Finished Hex Nut.
Heavy Hex
A heavier pattern version of a
standard hex nut.
Nylon Insert Lock
A nut with a nylon insert to
prevent backing off. Also
referred to as a Nylock.
Jam
A hex nut with a reduced
height.
Nylon Insert Jam Lock
A nylock nut with a reduced
height.
Wing
A nut with ‘wings’ for hand
tightening.
Cap
A nut with a domed top over
the end of the fastener.
Acorn
Acorn nuts are a high crown
type of cap nut, used for
appearance.
Flange
A nut with a built in washer
like flange.
Tee
A nut designed to be driven
into wood to create a threaded
hole.
Coupling
Coupling nuts are long nuts
used to connect pieces of
threaded rod or other male
fasteners.
Square
A four sided nut.
Prevailing Torque Lock
A non-reversible lock nut used
for high temperature applica
-
tions.
K-Lock or Kep
A nut with an attached
free-spinning external tooth
lock washer.
Castle
Castle nuts are used in
conjunction with a cotter pin
on drilled shank fasteners to
prevent loosening.
Slotted
Slotted nuts are used in
conjunction with a cotter pin
on drilled shank fasteners to
prevent loosening.